Used BMW i4 Seat Belt Pretensioner

Yes, all BMW i4 variants are fitted with seat belt pretensioners as standard — this is a safety-critical component built into every car regardless of drive variant (eDrive40, M50, xDrive40 etc.), so you are in the right place looking for this part. Pretensioners are single-use devices: once fired in a collision they must be replaced and cannot be reset or reused. Always have this component fitted by a qualified technician.

The BMW i4 launched in late 2021 as a single generation (G26) and, as of the time of writing, remains within that same generation through 2022–2024 production, which is a positive sign for compatibility. That said, pretensioner variants can differ even within a generation, so you should confirm the exact part reference against your registration with the breaker before buying. Never assume fitment across any production year without that check, especially on a safety-critical part like this.

Seat configuration and seat style can vary between i4 trim levels (for instance, M Sport and M50 models may feature different front seat designs compared to the standard Sport trim), which can affect pretensioner compatibility. You should confirm the specific trim and seat type on your car against what the breaker has available, rather than assuming any i4 pretensioner is a direct swap. This is especially important given the safety-critical nature of the part.

Yes, seat belt pretensioners are side-specific — a driver's side (OS, offside, right-hand side in a UK car) pretensioner is not interchangeable with a passenger's side (NS, nearside, left-hand side) pretensioner. Always tell the breaker clearly which side you need, and confirm it matches your car's specification. Fitting the wrong side is a serious safety risk and should never be attempted.

No — seat belt pretensioners are single-use pyrotechnic devices and are completely non-functional once they have been fired, exactly like an airbag. Any reputable breaker will only supply an undeployed unit removed from a vehicle where the pretensioner was not triggered. Always ask the breaker to confirm the unit has never been deployed before purchasing, and have it installed by a qualified professional.

The i4's pretensioner compatibility can depend on factors including production date, trim level, and seat type, and these variants are something you must confirm with the breaker against your vehicle's registration number rather than going by listing descriptions alone. Give the breaker your full registration so they can cross-reference the correct part number for your specific car. Because this is a safety-critical component, getting the match wrong is not worth the risk.